Answer:
They are more likely to have more debt. They have better investment instincts. They have taken more economic classes.
So only avoiding all types of intimate genital pervents stds. even having sex once that's the risk to having an infection or dessice nothing bad but a dessice could get really bad (stds aids)
A social psychologist would be interested in how groups interact.
It's the white blood cells I think
I would like to say around 20-25 people